PRINCETON, N.J., July 22 -- Ed Witten is one of the 21st century's most celebrated physicists and with good reason -- many of his peers believe he is almost always right. A professor at Princeton ...

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For decades, physicists have been trying to combine quantum physics and general relativity into a single, unified theory. One of the leading contenders is string theory, an elegant vision in which ...

Heterotic string theory remains a captivating framework in the pursuit of unifying quantum mechanics with gravity. By merging aspects of bosonic and supersymmetric strings, it provides a fertile ...

The grand scheme, a stepping-stone to string theory, is still high on physicists' wish lists. But if no solid evidence surfaces soon, it could begin to have a serious PR problem For decades now ...